|University of California, Berkeley|
|Directory News Site Map Home|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Annual, perennial herb, often rhizomed or stoloned, often of wet open places; roots fibrous; generally bisexual. Stem: generally 3-sided, generally solid. Leaf: generally 3-ranked; base sheathing, sheath generally closed, ligule generally 0; blade (0 or) linear, parallel-veined. Inflorescence: spikelets generally arranged in head-, spike-, raceme-, or panicle-like inflorescences; flower generally sessile in axil of flower bract, enclosed in a sac-like structure (perigynium) or generally not. Flower: small, generally wind-pollinated; perianth 0 or generally bristle like; stamens generally 3, anthers attached at base, 4 chambered; ovary superior, chamber 1, ovule 1, style 2–3-branched. Fruit: achene, 2–3 sided.
± 100 genera, 5000 species: especially temperate. [Ball et al. 2002 FNANM 23:1–608] Difficult; taxa differ in technical characters of inflorescence, fruit. In Carex and Kobresia, what appear to be pistillate flowers in fact are highly reduced inflorescences (whether or not the same applies to staminate flowers is still under debate). In some other works (e.g., FNANM) these are called spikelets, and they are treated as being arranged in spikes. Here and in TJM (1993), what appear to be pistillate flowers are called pistillate flowers in Carex (and they are treated as being arranged in spikelets), but spikelets in Kobresia (and they are treated as being arranged into spikes). Though internally inconsistent, the approach here is consistent with traditional usage, and reflects a preference for character states that may be determined in the field. —Scientific Editors: S. Galen Smith, Thomas J. Rosatti, Bruce G. Baldwin.
Unabridged references: [Tucker 1987 J Arnold Arbor 68:361–445; Bruhl 1995 Australian Syst Bot 8:125–305]
Key to Cyperaceae
Annual, perennial herb, cespitose, rhizomed or not. Stem: simple, cylindric, <= 0.5 mm diam, not hollow. Leaf: basal, spiraled, 1–few; blade vestigial to >> sheath, <= 1 mm wide; ligule 0. Inflorescence: terminal, head-like, inflorescence bracts 1–2, 2–33 mm, leaf-like; spikelets 1–3(15), ± ovate, ± flat or not, many-flowered, 1–10 mm, 1–2 mm wide; flower bracts spiraled, each with 1 flower in axil, ovate, membranous, tip entire, generally short-awned. Flower: bisexual; perianth 0; stamens 1–3, anthers >= 0.6 mm; style 1, thread-like, base ± enlarged or not, stigmas 2–3. Fruit: ± wide-obovate, generally ± white to dark brown, minute-papillate, prominent-ridged lengthwise, or smooth, mucronate; tubercle 0.Key to Isolepis
69 species: temperate, subtropics, ± worldwide, especially Africa, Australia. (Greek: equal flower bract) [Muasya et al. 2007 Novon 17:59]
Unabridged etymology: (Greek, isos, equal, similar, and lepis a flower bract)
Unabridged references: [Muasya et al. 2006 Novon 16:19–20; Smith 2002 FNANM 23:137–140; Musaya & Simpson 2002 Kew Bull 57:257–362.]
Annual (perennial herb?) 4–40 cm. Leaf: 1. Inflorescence: inflorescence bracts 2–6(23) mm; flower bracts not clasping shed fruit, basal <= 2 mm, others 1.2–1.8 mm, awn < 0.1 mm. Flower: stigmas 2–3. Fruit: 0.8–1 mm, 0.5–0.7 mm wide, 2–3-sided, shallower than wide, sides convex or ± concave, fine-papillate or smooth.
2n=30. Sandy, sometimes brackish sea shores, bluffs, sand dunes, creeks, marshes; < 800 m. North Coast, Great Central Valley, Central Coast, San Francisco Bay Area, South Coast, San Bernardino Mountains/Desert Mountains; to British Columbia; Texas (naturalized); South America, Eurasia, Africa, Australia, New Zealand. [Scirpus cernuus Vahl] Late spring–winter [Online Interchange]
Previous taxon: Isolepis carinata
Next taxon: Isolepis levynsiana
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Dec 11 2013
Citation for this treatment: [Author of taxon treatment] 2012. Isolepis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=79218, accessed on Dec 11 2013
Copyright © 2013 Regents of the University of California
We encourage links to these pages, but the content may not be downloaded for reposting, repackaging, redistributing, or sale in any form, without written permission from The Jepson Herbarium.
|Bioregions in which Isolepis cernua occurs||Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.|
Chart based on elevation range in eFlora and elevations and coordinates of CCH records.
Data provided by the participants of the Consortium of California Herbaria.
Note: About half of the CCH records include both elevation and coordinates.
| Data provided by the participants of the Consortium of California Herbaria.
View all CCH records
CCH collections by month